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NetBSD 6.1.5 - man page for x509_verify_param_set_flags (netbsd section 3)

X509_VERIFY_PARAM_set_flags(3)		     OpenSSL		   X509_VERIFY_PARAM_set_flags(3)

       X509_VERIFY_PARAM_set_flags, X509_VERIFY_PARAM_clear_flags, X509_VERIFY_PARAM_get_flags,
       X509_VERIFY_PARAM_set_purpose, X509_VERIFY_PARAM_set_trust, X509_VERIFY_PARAM_set_depth,
       X509_VERIFY_PARAM_get_depth, X509_VERIFY_PARAM_set_time, X509_VERIFY_PARAM_add0_policy,
       X509_VERIFY_PARAM_set1_policies - X509 verification parameters

       libcrypto, -lcrypto

	#include <openssl/x509_vfy.h>

	int X509_VERIFY_PARAM_set_flags(X509_VERIFY_PARAM *param, unsigned long flags);
	int X509_VERIFY_PARAM_clear_flags(X509_VERIFY_PARAM *param,
							       unsigned long flags);
	unsigned long X509_VERIFY_PARAM_get_flags(X509_VERIFY_PARAM *param);

	int X509_VERIFY_PARAM_set_purpose(X509_VERIFY_PARAM *param, int purpose);
	int X509_VERIFY_PARAM_set_trust(X509_VERIFY_PARAM *param, int trust);

	void X509_VERIFY_PARAM_set_time(X509_VERIFY_PARAM *param, time_t t);

	int X509_VERIFY_PARAM_add0_policy(X509_VERIFY_PARAM *param,
						       ASN1_OBJECT *policy);
	int X509_VERIFY_PARAM_set1_policies(X509_VERIFY_PARAM *param,
					       STACK_OF(ASN1_OBJECT) *policies);

	void X509_VERIFY_PARAM_set_depth(X509_VERIFY_PARAM *param, int depth);
	int X509_VERIFY_PARAM_get_depth(const X509_VERIFY_PARAM *param);

       These functions manipulate the X509_VERIFY_PARAM structure associated with a certificate
       verification operation.

       The X509_VERIFY_PARAM_set_flags() function sets the flags in param by oring it with flags.
       See the VERIFICATION FLAGS section for a complete description of values the flags
       parameter can take.

       X509_VERIFY_PARAM_get_flags() returns the flags in param.

       X509_VERIFY_PARAM_clear_flags() clears the flags flags in param.

       X509_VERIFY_PARAM_set_purpose() sets the verification purpose in param to purpose. This
       determines the acceptable purpose of the certificate chain, for example SSL client or SSL

       X509_VERIFY_PARAM_set_trust() sets the trust setting in param to trust.

       X509_VERIFY_PARAM_set_time() sets the verification time in param to t. Normally the
       current time is used.

       X509_VERIFY_PARAM_add0_policy() enables policy checking (it is disabled by default) and
       adds policy to the acceptable policy set.

       X509_VERIFY_PARAM_set1_policies() enables policy checking (it is disabled by default) and
       sets the acceptable policy set to policies. Any existing policy set is cleared. The
       policies parameter can be NULL to clear an existing policy set.

       X509_VERIFY_PARAM_set_depth() sets the maximum verification depth to depth.  That is the
       maximum number of untrusted CA certificates that can appear in a chain.

       X509_VERIFY_PARAM_set_flags(), X509_VERIFY_PARAM_clear_flags(),
       X509_VERIFY_PARAM_set_purpose(), X509_VERIFY_PARAM_set_trust(),
       X509_VERIFY_PARAM_add0_policy() and X509_VERIFY_PARAM_set1_policies() return 1 for success
       and 0 for failure.

       X509_VERIFY_PARAM_get_flags() returns the current verification flags.

       X509_VERIFY_PARAM_set_time() and X509_VERIFY_PARAM_set_depth() do not return values.

       X509_VERIFY_PARAM_get_depth() returns the current verification depth.

       The verification flags consists of zero or more of the following flags ored together.

       X509_V_FLAG_CRL_CHECK enables CRL checking for the certificate chain leaf certificate. An
       error occurs if a suitable CRL cannot be found.

       X509_V_FLAG_CRL_CHECK_ALL enables CRL checking for the entire certificate chain.

       X509_V_FLAG_IGNORE_CRITICAL disabled critical extension checking. By default any unhandled
       critical extensions in certificates or (if checked) CRLs results in a fatal error. If this
       flag is set unhandled critical extensions are ignored. WARNING setting this option for
       anything other than debugging purposes can be a security risk. Finer control over which
       extensions are supported can be performed in the verification callback.

       THe X509_V_FLAG_X509_STRICT flag disables workarounds for some broken certificates and
       makes the verification strictly apply X509 rules.

       X509_V_FLAG_ALLOW_PROXY_CERTS enables proxy certificate verification.

       X509_V_FLAG_POLICY_CHECK enables certificate policy checking, by default no policy
       checking is peformed. Additional information is sent to the verification callback relating
       to policy checking.

       require explicit policy, inhibit any policy and inhibit policy mapping flags respectively
       as defined in RFC3280. Policy checking is automatically enabled if any of these flags are

       If X509_V_FLAG_NOTIFY_POLICY is set and the policy checking is successful a special status
       code is set to the verification callback. This permits it to examine the valid policy tree
       and perform additional checks or simply log it for debugging purposes.

       By default some additional features such as indirect CRLs and CRLs signed by different
       keys are disabled. If X509_V_FLAG_EXTENDED_CRL_SUPPORT is set they are enabled.

       If X509_V_FLAG_USE_DELTAS ise set delta CRLs (if present) are used to determine
       certificate status. If not set deltas are ignored.

       X509_V_FLAG_CHECK_SS_SIGNATURE enables checking of the root CA self signed cerificate
       signature. By default this check is disabled because it doesn't add any additional
       security but in some cases applications might want to check the signature anyway. A side
       effect of not checking the root CA signature is that disabled or unsupported message
       digests on the root CA are not treated as fatal errors.

       The X509_V_FLAG_CB_ISSUER_CHECK flag enables debugging of certificate issuer checks. It is
       not needed unless you are logging certificate verification. If this flag is set then
       additional status codes will be sent to the verification callback and it must be prepared
       to handle such cases without assuming they are hard errors.

       The above functions should be used to manipulate verification parameters instead of legacy
       functions which work in specific structures such as X509_STORE_CTX_set_flags().

       Delta CRL checking is currently primitive. Only a single delta can be used and (partly due
       to limitations of X509_STORE) constructed CRLs are not maintained.

       If CRLs checking is enable CRLs are expected to be available in the corresponding
       X509_STORE structure. No attempt is made to download CRLs from the CRL distribution points

       Enable CRL checking when performing certificate verification during SSL connections
       associated with an SSL_CTX structure ctx:

	 X509_VERIFY_PARAM *param;
	 param = X509_VERIFY_PARAM_new();
	 X509_VERIFY_PARAM_set_flags(param, X509_V_FLAG_CRL_CHECK);
	 SSL_CTX_set1_param(ctx, param);



1.0.1i					    2014-04-08		   X509_VERIFY_PARAM_set_flags(3)

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